| 烧结温度对BN/Ni(Cr)自润滑材料组织与性能的影响 |
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| 引用本文： | 蒋冰玉,王日初,彭超群.烧结温度对BN/Ni(Cr)自润滑材料组织与性能的影响[J].中南大学学报(自然科学版),2012,43(1):93-99. |
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| 作者姓名： | 蒋冰玉 王日初 彭超群 |
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| 作者单位： | 中南大学材料科学与工程学院,湖南长沙,410083 |
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| 基金项目： | 国家民口配套科研项目(MKPT-03-182) |
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| 摘 要： | 以Ni-20％Cr(质量分数)合金粉末作为基体材料,添加体积分数为31.4％的六方BN(h-BN)作为固体润滑剂,采用粉末冶金法制备BN/Ni(Cr)自润滑复合材料.研究不同烧结温度对该复合材料硬度、弯曲强度和孔隙率以及显微组织的影响.研究结果表明:BN/Ni(Cr)自润滑材料的硬度和抗弯强度与Ni-Cr颗粒烧结颈的形成、长大以及孔隙率的变化有关；当烧结温度不超过1 180℃时,随着温度的升高,BN/Ni(Cr)复合材料的孔隙率下降,硬度和弯曲强度均呈上升趋势.
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| 关 键 词： | BN/Ni(Cr)复合材料 烧结温度 显微组织 力学性能 |
Influence of sintering temperature on structure and properties of BN/Ni(Cr) self-lubricating composites |
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| JIANG Bing-yu
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WANG Ri-chu
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PENG Chao-qun.Influence of sintering temperature on structure and properties of BN/Ni(Cr) self-lubricating composites[J].Journal of Central South University:Science and Technology,2012,43(1):93-99. |
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| Authors: | JIANG Bing-yu WANG Ri-chu PENG Chao-qun |
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| Institution: | (School of Materials Science and Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | BN/Ni(Cr) self-lubricating composites were fabricated by powder metallurgy,where the Ni-Cr solid solution powder was used as matrix material,with a hexagonal BN(h-BN) powder added as solid lubricant.Effects of sintering temperature on the density,porosity,hardness and three-point bending strength were studied.Meanwhile,the microstructural evolution of BN/Ni(Cr) composites was observed.It is found that the hardness and three-point bending strength of BN/Ni(Cr) self-lubricating composites are related to the formation,growth of the sintered necks and variance of the porosity.Besides,when the temperature is no higher than 1 180 ℃,the porosity of BN/Ni(Cr) composites decreases with the increase of temperature,while the hardness and three-point bending strength of them increase. |
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| Keywords: | BN/Ni(Cr) composites sintering temperature microtructure mechanical properties |
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